Cost to Run a Tankless Electric Water Heater in Delaware
Delaware's average residential electricity rate is 18.8¢/kWh as of April 2026 — the 33rd cheapest in the country, 0% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $72.01 per month.
Per hour
$3.38
at 13,000–27,000 W
Per day
$2.37
0.7 hours/day
Per month
$72.01
383 kWh
Per year
$865
4,599 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.18 | $36.01 | $432 |
| Typical (0.7 hrs/day) | $2.37 | $72.01 | $865 |
| Heavy (1.4 hrs/day) | $4.74 | $144 | $1,729 |
Delaware vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Delaware?
At Delaware's current average residential rate of 18.8¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $2.37 per day, $72.01 per month, or $865 per year.
Is running a tankless electric water heater in Delaware more expensive than average?
It's almost exactly the U.S. average: $72.01 per month here versus $72.01 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 18.8¢ per kWh as of April 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.